Rich and classic, it’s hard to believe these are so easy to make. Be sure to use very good butter for this.

  • 2 sticks (8 ounces) unsalted butter, plus more for the pan
  • 3/4 cup powdered sugar
  • 2 cups all-purpose flour
  • 1/4 teaspoon coarse salt

Place 2 sticks unsalted butter in the bowl of a stand mixer (or large bowl if using an electric hand mixer). Let sit at room temperature until softened. Coat an 8- or 9-inch square metal baking pan with more butter.

Beat the butter on high speed with the paddle attachment until fluffy, 3 to 5 minutes. With the mixer running, gradually add 3/4 cup powdered sugar and continue to beat until pale and fluffy.

Stop the mixer. Sift 2 cups all-purpose flour into the bowl, then add 1/4 teaspoon coarse salt. Mix on low speed until just combined. Transfer to the prepared pan and pat to an even thickness no more than 1/2-inch thick. Refrigerate for at least 30 minutes.

Meanwhile, arrange a rack in the middle of the oven and heat the oven to 300°F.
Slice the dough into rectangles or squares in the pan and take a chopstick and poke several holes into, but not through, the dough. This helps it cook more evenly.

Bake until golden-brown and the middle is firm, 45 to 60 minutes. Let cool completely. Re-slice, if needed, before serving.